Image display device having a drive transistor with a channel length longer than a channel length of individual switching transistors

An image display device comprising:

• a first scanning line extending along a row direction;
• a second scanning line extending along the row direction;
• a third scanning line extending along the row direction;
• a fourth scanning line extending along the row direction;
• a signal line extending along a column direction and configured to supply a video signal;
• a first voltage line;
• a second voltage line;
• a third voltage line;
• and
• a pixel circuit connected to the first scanning line, the second scanning line, the third scanning line, the fourth scanning line, the signal line, the first voltage line, and the second voltage line, and the third voltage line, wherein
• the pixel circuit includes a sampling transistor, a drive transistor, a pixel capacitor, a light emitting device, a first switching transistor, a second switching transistor, and a third switching transistor,
• the first switching transistor is connected between the first voltage line and the driving transistor,
• the second switching transistor is connected between the second voltage line and the light emitting device,
• the third switching transistor is connected between the third voltage line and the pixel capacitor, and is connected between the third voltage line and a control terminal of the drive transistor,
• the first scanning line is connected to a control terminal of the first switching transistor,
• the second scanning line is connected to a control terminal of the second switching transistor,
• the third scanning line is connected to a control terminal of the sampling transistor,
• the fourth scanning line is connected to a control terminal of the third switching transistor, and
• a channel length of the drive transistor is longer than a channel length of the first switching transistor, is longer than a channel length of the second switching transistor, and is longer than a channel length of the third switching transistor.